.eslintrc

{
  "parser": "@typescript-eslint/parser",

  "parserOptions": {
    "project": "./tsconfig.json",
    "sourceType": "module"
  },

  "extends": [
    "xo",
    "plugin:jest/recommended",
    "plugin:@typescript-eslint/recommended",
    "plugin:import/errors",
    "plugin:import/warnings",
    "plugin:import/typescript",
    "prettier"
  ],

  "plugins": ["jest", "@typescript-eslint", "eslint-plugin-jsdoc", "import"],

  "rules": {
    "import/no-extraneous-dependencies": 2,
    /* xo config */

    // makes commenting out lines quickly a hassle
    "capitalized-comments": 0,
    "camelcase": 0,
    "default-param-last": 0,
    "complexity": ["error", { "max": 25 }],
    "no-unused-vars": "off",

    /* jest plugin */

    "jest/prefer-strict-equal": 2,
    "jest/prefer-spy-on": 2,
    "jest/no-standalone-expect": 2,
    "jest/no-try-expect": 2,
    "jest/no-export": 2,
    "jest/no-truthy-falsy": 1,
    "jest/no-duplicate-hooks": 1,
    "jest/no-if": 1,
    "jest/prefer-to-have-length": 1,

    /* typescript */

    "no-undef": 0,
    "@typescript-eslint/explicit-module-boundary-types": 0,
    "@typescript-eslint/ban-ts-comment": 0,
    "@typescript-eslint/no-unnecessary-type-arguments": 2,
    "@typescript-eslint/no-unnecessary-type-assertion": 2,
    "@typescript-eslint/no-unnecessary-boolean-literal-compare": 2,
    "@typescript-eslint/no-unnecessary-qualifier": 2,
    "@typescript-eslint/no-this-alias": 2,
    "@typescript-eslint/no-useless-constructor": 2,
    "@typescript-eslint/no-floating-promises": 2,
    "@typescript-eslint/prefer-reduce-type-parameter": 2,
    "@typescript-eslint/prefer-as-const": 2,
    "@typescript-eslint/prefer-for-of": 2,
    "@typescript-eslint/prefer-optional-chain": 2,
    "@typescript-eslint/prefer-readonly": 2,
    "@typescript-eslint/array-type": [2, { "default": "array-simple" }],
    "@typescript-eslint/no-unused-vars": ["error"],

    // just rely on typescript inference
    "@typescript-eslint/explicit-function-return-type": 0,
    "@typescript-eslint/camelcase": 0,
    "@typescript-eslint/interface-name-prefix": 0,
    "@typescript-eslint/no-non-null-assertion": 0,
    "@typescript-eslint/explicit-member-accessibility": 0,

    /* jsdoc settings */
    "jsdoc/check-alignment": 1,
    "jsdoc/check-param-names": 1,
    "jsdoc/check-tag-names": 1,
    "jsdoc/implements-on-classes": 1,
    "jsdoc/newline-after-description": 1,
    "jsdoc/no-types": 1,
    "jsdoc/require-param-description": 1,
    "jsdoc/require-returns-check": 1,
    "jsdoc/require-returns-description": 1,
    "jsdoc/require-hyphen-before-param-description": [1, "always"],
    "jsdoc/require-jsdoc": [
      2,
      {
        "contexts": ["TSPropertySignature", "ClassProperty"],
        "require": {
          "ArrowFunctionExpression": true,
          "FunctionDeclaration": true,
          "ClassDeclaration": true,
          "MethodDefinition": true
        }
      }
    ]
  },

  "overrides": [
    {
      "files": ["*.test.*"],
      "rules": {
        "import/no-extraneous-dependencies": 0,
        "import/namespace": 0,
        "no-import-assign": 0,
        "@typescript-eslint/no-empty-function": 0,
        "@typescript-eslint/no-non-null-assertion": 0,
        "@typescript-eslint/no-explicit-any": 0,
        "require-atomic-updates": 0,
        "max-nested-callbacks": 0,
        "@typescript-eslint/ban-ts-ignore": 0,
        "jsdoc/require-jsdoc": 0
      }
    }
  ]
}